I had a damn hard time, to find a solution for my background jpg Problem.

Reason was, someone did not send me the proper JPG files and saved them in CMYK-Mode. Firfox can handle it and so I thought I was lucky! But IE could not show them...

Solution in the code?

NO! SAVE YOUR DARN JPG IN RGB AND YOUR FINE AAAARGH!

With a sweet little comand:
rsop.msc

This is also very nice:
net user /domain USERNAME
(same as #id user in LINUX)